DCHP-1 Online
jam dragger Lumbering 
an arrangement of ropes attached to a key-log (def. 1) so it could be pulled free to release a log jam.
See also: key-log (def. 1)
- 1961 Sometimes the key logs of the jam could be pried loose from the shore with the jam dragger, a series of ropes attached to the key logs.
- 1961 Sometimes the key logs of the jam could be pried loose from the shore with the jam dragger, a series of ropes attached to the key logs.